Huawei BBU15-D-T is a battery backup unit with a slot for 4 AA batteries. It has a DC socket for connecting an external power supply, in case of its failure, it switches to battery power. The output voltage is 12 V DC and the current is 1.5 A. The DC plug has a standard dimension of 2.1 / 5.5 mm, the offered product is perfect for working with GPON / EPON ONT and various routers and will provide power in the event of a power failure. After the power is restored, the BBU15-D-T starts to charge the installed batteries.

The product doesn't include AA batteries!